The SPA4-100 four-channel amplifier delivers 100 watts RMS per channel into 4 or 8 ohms; the four channels can also be bridged in pairs, each pair providing up to 200 watts RMS into 4 or 8 ohms. The SPA4-100 bridged pair channels can be switched into 70V or 100V direct drive mode providing up to 350 watts RMS into a 70V or 100V output; when in 70V or 100V mode the 80Hz highpass filter is automatically engaged.
Features
- Up to 200 watts per channel into 4 and 8 ohms — the outputs of the SPA4-100 model are designed to provide up to 100 watts per channel into Low-Z loads.
- ENERGY STAR® qualified amplifier – The ENERGY STAR-qualified SPA amplifiers employ an efficient class-D design to conserve energy and reduce operational costs.
- Bridgeable outputs for higher power — Bridgeable outputs for higher power – Bridging the outputs of the SPA4-100 will deliver up to 350 watts into 70V or 100V when bridged.
- Auto-Ramp provides quiet startup and power-down — The ENERGY STAR auto-ramp circuitry ensures quiet and fast power-up from standby and seamless power-down following 25 minutes of inactivity, dramatically reducing power consumption.
- Rack-mountable 1U, half rack width enclosure — The SPA amplifiers can be mounted in 1 RU, 1/2 rack space, and their clever joining brackets enable easy under-table and wall-mounting
| SPECIFICATIONS | SPA2-60 | SPA4-60 | SPA2-200 | SPA4-100 |
| Stereo Mode Watts Per Channel | ||||
| 8 Ω dynamic, both channels driven | 60 W | 60 W | 200 W | 100 W |
| 4 Ω dynamic, both channels driven | 60 W | 60 W | 200 W | 100 W |
| Bridged Mode Watts per channel | ||||
| 8 Ω & 4 Ω | 200 W | 100 W continuous | 400 W | 200 W |
| 70 V & 100 V | 250 W | 125 W | 350 W | 175 W* |
| Signal to Noise (A-weighted, 20 Hz-20 kHz) | >100 dB | >100 dB | >100 dB | >100 dB |
| Input Sensitivity | 1.23 Vrms (+4 dBu) | 1.23 Vrms (+4 dBu) | 1.23 Vrms (+4 dBu) | 1.23 Vrms (+4 dBu) |
| Maximum Voltage Gain | 25.0 dB | 25.0 dB | 25.0 dB | 25.0 dB |
| Output Circuitry | Class D | Class D | Class D | Class D |
| Frequency Response (20 Hz – 20 kHz) | Frequency Response (20 Hz – 20 kHz) | |||
| Input Impedance | >10 kΩ (balanced), >10 kΩ (unbalanced) | |||
| Maximum Input Level | 12.3V (+24 dBu) | |||
| Highpass Filter | Switchable 80 Hz when Bridged in 70V & 100V | |||
| Front Panel Indicators | Power, per channel Signal, per channel Protect/Limit | |||
| Controls | 4Ω/8Ω/70V Bridge Highpass On/100V Bridged Highpass On per channel pair | |||
| Dimensions (HWD) inches | 1.7 x 8.7 x 9.5 / 1RU | |||
| Dimensions (HWD) mm | 43 x 220 x 241 / 1RU | |||
| Weight (Net) | 3.5 lb / 1.6 kg | 3.5 lb / 1.6 kg | 4.0 lb / 1.4 kg | 4.0 lb / 1.4 kg |
| Weight (Shipping) | 6 lb / 2.3 kg | 6 lb / 2.3 kg | 6.5 lb / 2.5 kg | 6.5 lb / 2.5 kg |
| Agency Approvals | UL, CE, ENERGY STAR, RoHS/WEEE compliant, FCC Class B (Conducted and Radiated emissions), UL 2043 witd PL-Kit | |||
| Carton Contents | Power cable, quick start guide, connector kit, rack mount ears, mounting brackets | |||
| *Peak Power 250 W | ||||
All specifications are subject to change without notice.
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